<template>
  <div class="login-container">
    <el-row>
      <el-col :lg="14" :md="11" :sm="24" :xl="14" :xs="24">
        <div style="color: transparent">占位符</div>
      </el-col>
      <el-col :lg="9" :md="12" :sm="24" :xl="9" :xs="24">
        <el-form
          ref="formRef"
          class="login-form"
          label-position="left"
          :model="form"
          :rules="rules"
        >
          <div class="title">hello !</div>
          <div class="title-tips">
            {{ translateTitle('欢迎来到') }}{{ title }}！
          </div>
          <el-form-item prop="name" style="margin-top: 40px">
            <el-input
              v-model.trim="form.name"
              v-focus
              :placeholder="translateTitle('请输入用户名')"
              tabindex="1"
              type="text"
            >
              <template #prefix>
                <vab-icon icon="user-line" />
              </template>
            </el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              :key="passwordType"
              ref="passwordRef"
              v-model.trim="form.password"
              :placeholder="translateTitle('请输入密码')"
              tabindex="2"
              :type="passwordType"
              @keyup.enter="handleLogin"
            >
              <template #prefix>
                <vab-icon icon="lock-line" />
              </template>
              <template v-if="passwordType === 'password'" #suffix>
                <vab-icon
                  class="show-password"
                  icon="eye-off-line"
                  @click="handlePassword"
                />
              </template>
              <template v-else #suffix>
                <vab-icon
                  class="show-password"
                  icon="eye-line"
                  @click="handlePassword"
                />
              </template>
            </el-input>
          </el-form-item>
          <!-- 验证码验证逻辑需自行开发，如不需要验证码功能建议注释 -->
          <!-- <el-form-item prop="verificationCode">
            <el-input
              v-model.trim="form.verificationCode"
              :placeholder="translateTitle('验证码') + previewText"
              tabindex="3"
              type="text"
            >
              <template #prefix>
                <vab-icon icon="barcode-box-line" />
              </template>
            </el-input>
            <el-image class="code" :src="codeUrl" @click="changeCode" />
          </el-form-item> -->
          <el-button
            class="login-btn"
            :loading="loading"
            type="primary"
            @click="handleLogin"
          >
            {{ translateTitle('登录') }}
          </el-button>
          <!-- <router-link to="/register">
            <div style="margin-top: 20px">{{ translateTitle('注册') }}</div>
          </router-link> -->
        </el-form>
      </el-col>
      <el-col :lg="1" :md="1" :sm="24" :xl="1" :xs="24">
        <div style="color: transparent">占位符</div>
      </el-col>
    </el-row>
  </div>
</template>

<script>
  import {
    computed,
    defineComponent,
    nextTick,
    onBeforeMount,
    reactive,
    toRefs,
    watchEffect,
  } from 'vue'
  import { useStore } from 'vuex'
  import { onBeforeRouteLeave, useRoute, useRouter } from 'vue-router'
  import { translateTitle } from '@/utils/i18n'
  import { isPassword } from '@/utils/validate'

  export default defineComponent({
    name: 'Login',
    directives: {
      focus: {
        inserted(el) {
          el.querySelector('input').focus()
        },
      },
    },
    setup() {
      const store = useStore()
      const route = useRoute()
      const router = useRouter()

      const login = (form) => store.dispatch('user/login', form)

      const validateUsername = (rule, value, callback) => {
        if ('' === value) callback(new Error(translateTitle('用户名不能为空')))
        else callback()
      }
      const validatePassword = (rule, value, callback) => {
        if (!isPassword(value))
          callback(new Error(translateTitle('密码不能少于6位')))
        else callback()
      }

      const state = reactive({
        formRef: null,
        form: {
          name: '',
          password: '',
          verificationCode: '',
        },
        rules: {
          name: [
            {
              required: true,
              trigger: 'blur',
              validator: validateUsername,
            },
          ],
          password: [
            {
              required: true,
              trigger: 'blur',
              validator: validatePassword,
            },
          ],
          /* verificationCode: [
          {
            required: true,
            trigger: 'blur',
            message: '验证码不能空',
          },
        ], */
        },
        loading: false,
        passwordType: 'password',
        redirect: undefined,
        timer: 0,
        codeUrl: 'https://www.oschina.net/action/user/captcha',
        previewText: '',
      })

      const handleRoute = () => {
        console.log(state.redirect)
        return '/'
        // return state.redirect === '/404' || state.redirect === '/403'
        //   ? '/'
        //   : state.redirect
      }
      const handlePassword = () => {
        state.passwordType === 'password'
          ? (state.passwordType = '')
          : (state.passwordType = 'password')
        nextTick(() => {
          state['passwordRef'].focus()
        })
      }
      const handleLogin = async () => {
        state['formRef'].validate(async (valid) => {
          if (valid)
            try {
              state.loading = true
              await login(state.form).catch(() => {})
              await router.push(handleRoute())
            } finally {
              state.loading = false
            }
        })
      }
      const changeCode = () => {
        state.codeUrl = `https://www.oschina.net/action/user/captcha?timestamp=${new Date().getTime()}`
      }

      onBeforeMount(() => {
        // state.form.name = 'admin'
        // state.form.password = '123456'
        // 为了演示效果，会在官网演示页自动登录到首页，正式开发可删除
        // if (
        //   document.domain === 'vue-admin-beautiful.com' ||
        //   document.domain === 'chu1204505056.gitee.io'
        // ) {
        //   state.previewText = '（演示地址验证码可不填）'
        //   state.timer = setTimeout(() => {
        //     handleLogin()
        //   }, 5000)
        // }
      })

      watchEffect(() => {
        state.redirect = (route.query && route.query.redirect) || '/'
      })

      onBeforeRouteLeave((to, from, next) => {
        clearInterval(state.timer)
        next()
      })

      return {
        translateTitle,
        ...toRefs(state),
        title: computed(() => store.getters['settings/title']),
        handlePassword,
        handleLogin,
        changeCode,
      }
    },
  })
</script>

<style lang="scss" scoped>
  .login-container {
    height: 100vh;
    background: url('~@/assets/login_images/background.jpg') center center fixed
      no-repeat;
    background-size: cover;
  }

  .login-form {
    position: relative;
    max-width: 100%;
    padding: 4.5vh;
    margin: calc((100vh - 475px) / 2) 5vw 5vw;
    overflow: hidden;
    background: url('~@/assets/login_images/login_form.png');
    background-size: 100% 100%;

    .title {
      font-size: 54px;
      font-weight: 500;
      color: var(--el-color-white);
    }

    .title-tips {
      margin-top: 29px;
      font-size: 26px;
      font-weight: 400;
      color: var(--el-color-white);
    }

    .login-btn {
      display: inherit;
      width: 220px;
      height: 50px;
      margin-top: 5px;
      border: 0;

      &:hover {
        opacity: 0.9;
      }

      .forget-passwordword {
        width: 100%;
        margin-top: 40px;
        text-align: left;

        .forget-password {
          width: 129px;
          height: 19px;
          font-size: 20px;
          font-weight: 400;
          color: rgba(92, 102, 240, 1);
        }
      }
    }

    .tips {
      margin-bottom: 10px;
      font-size: $base-font-size-default;
      color: var(--el-color-white);

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .title-container {
      position: relative;

      .title {
        margin: 0 auto 40px auto;
        font-size: 34px;
        font-weight: bold;
        color: var(--el-color-primary);
        text-align: center;
      }
    }

    i {
      position: absolute;
      top: 8px;
      left: 5px;
      z-index: $base-z-index;
      font-size: 16px;
      color: #d7dee3;
      cursor: pointer;
      user-select: none;
    }

    .show-password {
      position: absolute;
      right: 25px;
      left: -35px;
      font-size: 16px;
      color: #d7dee3;
      cursor: pointer;
      user-select: none;
    }

    :deep() {
      .el-form-item {
        padding-right: 0;
        margin: 20px 0;
        color: #454545;
        background: transparent;
        border: 1px solid transparent;
        border-radius: 2px;

        &__content {
          min-height: $base-input-height;
          line-height: $base-input-height;
        }

        &__error {
          position: absolute;
          top: 100%;
          left: 18px;
          font-size: $base-font-size-small;
          line-height: 18px;
          color: var(--el-color-red);
        }
      }

      .el-input {
        box-sizing: border-box;

        input {
          height: 48px;
          padding-left: 35px;
          font-size: $base-font-size-default;
          line-height: 58px;
          background: #f6f4fc;
          border: 0;
        }
      }

      .code {
        position: absolute;
        top: 4px;
        right: 4px;
        cursor: pointer;
        border-radius: $base-border-radius;
      }
    }
  }
</style>
